We identified 149 inflicted-injury deaths in our population during the 8-year study period. Children residing in households with unrelated adults were nearly 50 times as likely to die of inflicted injuries than children residing with 2 biological parents (adjusted odds ratio: 47.6; 95% confidence interval: 10.4–218). Children in households with a single parent and no other adults in residence had no increased risk of inflicted-injury death (adjusted odds ratio: 0.9; 95% confidence interval: 0.6–1.9). Perpetrators were identified in 132 (88.6%) of the cases. The majority of known perpetrators were male (71.2%), and most were the child's father (34.9%) or the boyfriend of the child's mother (24.2%). In households with unrelated adults, most perpetrators (83.9%) were the unrelated adult household member, and only 2 (6.5%) perpetrators were the biological parent of the child.

But women are the child abusers, huh? Wait a minute though. Using the information supplied above, the "support natural/biological family" crowd's assertion that the biological family is best, is correct; HOWEVER, single parent households (single moms) are just as safe AND STILL on top of that, it is the biological fathers that are doing the killing.

...Teigan Peters died on Father's Day at a campsite along the North Rim of the Grand Canyon. According to police, the 3-year-old's father, Ryan Peters, shot her and then killed himself. ...Investigators said Teigan's father was upset over the custody arrangement.

One more time, in case you didn't understand (emphasis mine):

Starling et al33 speculated that male caregivers are more dangerous then female caregivers. Our data offer support for this hypothesis and identify households in which a young child resides with his or her mother and her boyfriend as dramatically higher risk. In these high-risk households, the boyfriend was typically responsible for caring for the child at the time of the fatal-injury event and was the perpetrator of abuse. At the same time, it is important to note that although the relative risk is greater in households with unrelated adults, the most common male perpetrator of fatal inflicted injury was the child's biological father; nearly equal numbers of children were killed by their biological fathers as by other related and unrelated males, combined. For all household-composition categories, >70% of known perpetrators in our study were male, and >70% of known perpetrators lived with the decedent child.